296 



2. It is the richest in plankton of any of the North American lakes which 

 have so far been examined, and compares favorably with what are termed "plank- 

 ton rich" lakes. 



Works consulted : 

 Apstein, C. 



1892. Quantitative Plankton— Studien im Susswasser. Biol. Centralbl. 

 Bd. Xir, pp. 484-512. 



1894. Vergleich der Planktonproduktion in verschiedenen holsteinischen 

 Seen. Bericht d. naturf. Ges. zu Freiburg I Br. Bd. VIII, pp. 70-88. 

 Brooks, W. K. 



1894. The Origin of the Food of Marine Animals. Bull. U. S. Fish Com. 

 Vol. XIII, pp. 87-92. 

 Haeckel, Ernst. 



A Comparative Investigation of the Importance and Constitution of the Pe- 

 lagic Fauna and Flora. Translated by G. W. Field. Bull. U. S. Fish Com. for 

 1889-91, pp. 565-641. 

 Reighard, J. E. 



1893. A Biological Examination of Lake St. Clair. Bull, of Mich. Fish 

 Com. No. 4. 



Ward, Henry B. 



1894. A Biological Examination of Lake Michigan in the Travei'se Bay 

 Region. Bull. Mich. Fish Com. No. 6. 



PHYsrcAL Survey of Lakes Tippecanoe, Eagle, Webster and Cedar. By 

 Thomas Large, Assisted by C. O. & A. D. Fisher. 



The method of measurement in this work was the same as that employed by 

 Messrs. Juday and Ridgley and myself last year in the survey of Turkey Lake, 

 differing only in an attempt to follow such established lines as section lines, quar- 

 ter and half-section lines, which are usually indicated by farm fences, and, there- 

 fore, can be readily found, and are thus permanently marked. Profiting by the 

 experience of the previous year, we made but few cross lines, as they are very 

 confusing, particularly when made in rough weather. 



Three of the lakes sounded this year are parts of the Tippecanoe drainage 

 system — that river flowing through Lakes Webster and Tippecanoe, and being con- 

 nected with Eagle Lake by a small stream. Cedar Lake has for its outlet a small 

 stream flowing to the Kankakee River. Of these lakes Tippecanoe is the largest, 



